Write the Perimeter of the Rectangle as a Simplified Polynomial $30 x ( x + 4 ) ( x + 2 )$

Multiple Choice

Write the perimeter of the rectangle as a simplified polynomial. Then factor this polynomial completely.
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A) $30 x ( x + 4 ) ( x + 2 )$
B) $15 x ( x + 8 ) ( x + 6 )$
C) $15 x ^ { 2 } ( x + 4 ) ( x + 2 )$
D) $30 \left( x ^ { 2 } + 4 \right) ( x + 2 )$